ONESOURCE Indirect Tax vs. Zamp

ONESOURCE Indirect Tax from Thomson Reuters is a cloud-native platform that helps organizations automate indirect tax determination, compliance, reporting, and e-invoicing across global jurisdictions. Combining trusted tax content with powerful automation, ONESOURCE enables businesses to accurately calculate VAT, GST, sales and use tax, and excise tax while keeping pace with changing regulations.

Zamp is a fully managed sales tax compliance platform designed for modern digital businesses. After regulatory changes pushed enterprise-level complexity onto growing companies, Zamp was built to eliminate the burden entirely. Combining intelligent automation with a dedicated team of tax specialists, Zamp manages calculations, nexus tracking, registrations, filings, and state notices from start to finish. Unlike DIY tax software, Zamp owns both the work and the outcome, providing accuracy, predictable pricing, and ongoing support.